中文摘要：

鉴于锚箱结构体系及其受力特性的复杂性，以苏通大桥锚箱式索梁锚固结构为研究对象，采用理论研究与模型试验相结合的研究方法，对于锚箱式索梁锚固结构的传力途径、传力机理及其关键影响因素等相关关键问题进行系统研究。研究表明：斜拉索索力作用下锚箱式索梁锚固结构体系受剪力和弯矩的联合作用，并通过锚箱关键受力板件与钢箱梁腹板问的焊缝实现荷载传递，这一受力特性决定了锚箱结构的力学行为特性；由锚箱结构体系的复杂性所决定，不同的设计参数组合将导致其力学特性出现显著差异；锚箱顶底板与钢箱梁腹板的焊缝长度是影响其传力机理的关键因素；各关键影响因素对于锚箱结构力学行为特性的影响具有耦合性，对锚箱结构的传力机理进行系统研究是确定其关键设计参数从而实现其合理结构设计的基本前提。

英文摘要：

Because of the complexity of the structural system and the mechanical features of cable-girder anchorage, systematic study is necessary for structural design. Take the Sutong Bridge＇ s cable-girder anchorage structure as a subject of investigation, the load transfer path and mechanism and corresponding key influencing factors were systematically studied through theoretical analysis and model test. The results indicate that the load transfer function of anchorage is accomplished by the combination of shear and bending of its key plates, and the differences of stress distribution in such plates are induced by the load transfer characteristics mentioned above. Depending on the complexity of anchorage＇ s structural system, notable difference of mechanical characteristics can be induced by the combinations of structural design parameters. The lengths of anchorage＇ s bottom and top plates are key parameters that dominate the cable-girder anchorage＇ s load transfer mechanism. The effects of different factors are interactive, and the rational design parameters should be determined by comprehensive study.